自沖鉚接頭動力學分析
[Abstract]:Self-punching riveting technology is a kind of cold forming technology, which press the semi-hollow rivets into the bottom plate by punching head and open and deform in the bottom plate, forming the mechanical internal lock in the two-layer or multi-layer plate. Although self-punching riveting is a new thin-plate bonding technology, its mechanical properties are better than that of traditional spot welding. Self-punching riveting technology has been widely used in automobile industry, so it has aroused wide interest in other industrial fields. Self-punching riveting technology is regarded as the next generation connection technology, and it is a key technology in the process of automobile lightweight. The development of finite element method and computer technology can help to study its forming process and parameter optimization, and reduce the research cost. In order to better understand the forming process of the self-punching riveting head and optimize the process parameters, this paper first studies the forming process of the self-punching riveting head by numerical method and experimental method. A 2D axisymmetric model based on Cowper-Symonds material model was established by using dynamic software LS-DYNA, and the whole forming process was simulated by Lagrange method and r-adaptive mesh generation technique. The rationality of the simulation is verified by combining the experimental force-displacement curve and the joint profile. The influence of the parameters such as friction coefficient, forming time, plastic strain ratio and self-adaptive mesh interval on the forming process is analyzed. The friction coefficient directly affects the quality of self-punching riveting. The combination of different elastic modulus and Poisson's ratio and the combination of different elastic modulus and different density were analyzed by ANSYS finite element software. It is found that Poisson's ratio has little effect on the natural frequency of single-lap self-punching riveting head, and the natural frequency of self-punched riveting head increases with the increase of elastic modulus and decreases with the increase of density. On the basis of modal analysis, the response of self-punching riveting head under external load and transient performance under impact load are analyzed. Finally, the tensile shear test of the self-punching riveting head and the self-punching rivet-bond composite joint is studied, and its bearing capacity and failure mode are studied. According to the experimental results, there are two main failure modes: the riveting head pulling out from the lower plate and the lower plate breaking. The main purpose of this paper is to realize the numerical simulation of the self-punching riveting process and to study the dynamic performance of the self-punching riveting head, which provides the basis for further research.
【學位授予單位】:昆明理工大學
【學位級別】:碩士
【學位授予年份】:2011
【分類號】:TH131.1
【相似文獻】
相關期刊論文 前10條
1 周會成,鄧春梅,陳吉紅,黃聲華;散亂數(shù)據(jù)云的自適應網(wǎng)格劃分[J];華中科技大學學報(自然科學版);2002年10期
2 孫杰,袁國定,陳煒,姜銀方,余雷,仲志剛;沖壓成形仿真過程中有限元網(wǎng)格模型的建立[J];模具工業(yè);2003年06期
3 嚴愷;劉漢武;杜云慧;張鵬;;LS-DYNA在擠壓工藝數(shù)值模擬中的應用[J];模具工業(yè);2009年05期
4 姚勇,張?zhí)m榮,馬首文;紅山嘴水電廠發(fā)電機轉(zhuǎn)子繞組開路事故分析及預防[J];水力發(fā)電;1998年05期
5 董標;何曉聰;張文斌;;單搭自沖鉚接頭諧響應分析[J];新技術新工藝;2010年11期
6 于雷;汽車覆蓋件板料毛坯形狀的算法[J];長春工程學院學報(自然科學版);2005年02期
7 歲波;都東;常保華;黃華;;輕型車身自沖鉚連接技術的發(fā)展[J];汽車工程;2006年01期
8 徐安祥;擺動鉚接機的設計[J];機械工人.冷加工;1994年08期
9 鮑紅忠;臺鉆鉚接新方法[J];機械工藝師;1995年08期
10 田文明;;以沖鉚替代旋鉚的工藝設計[J];模具制造;2007年05期
相關會議論文 前3條
1 辛紅;梁昌洪;;多小波分析二維電磁散射[A];1997年全國微波會議論文集(下冊)[C];1997年
2 羅征;周新貴;于海蛟;王洪磊;趙爽;孫科;;三維C/SiC復合材料構件有限元熱耦合分析及結構優(yōu)化[A];復合材料:創(chuàng)新與可持續(xù)發(fā)展(下冊)[C];2010年
3 雷龍;李輝;;半掛車鋼板彈簧平衡懸架前支架的疲勞壽命分析[A];經(jīng)濟策論(下)[C];2011年
相關碩士學位論文 前10條
1 董標;自沖鉚接頭動力學分析[D];昆明理工大學;2011年
2 嚴柯科;自沖鉚接頭動力學數(shù)值模擬與疲勞分析[D];昆明理工大學;2011年
3 高山鳳;單搭自沖鉚接頭機械性能研究[D];昆明理工大學;2010年
4 張玉濤;單搭自沖鉚接頭的動力學分析與疲勞研究[D];昆明理工大學;2011年
5 車莉;通信車矩量法分析的自適應網(wǎng)格劃分研究[D];西安電子科技大學;2010年
6 趙景怡;飛機復雜曲面成形快速模擬[D];西北工業(yè)大學;2007年
7 張耀;STL模型拓撲及形狀信息提取算法的研究[D];華中科技大學;2009年
8 王巖;干式切削加工有限元仿真技術研究[D];大連交通大學;2010年
9 王軍偉;AZ31鎂合金的自沖鉚接工藝研究[D];鄭州大學;2010年
10 王大明;缸蓋氣門座圈切削過程仿真與優(yōu)化[D];吉林大學;2011年
,本文編號:2329189
本文鏈接:http://sikaile.net/kejilunwen/jixiegongcheng/2329189.html